The compiler is supposed to have the builtin defined _REENTRANT defined
when -pthread is passed, which wasn't done on the ARC architecture.

When _REENTRANT is not passed, the C library will not use reentrant
functions, and the latest version of ax_pthread.m4 from the
autoconf-archive will no longer detect that thread support is
available (see https://savannah.gnu.org/patch/?8186).

gcc/
2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>
	    Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

	* config/arc/arc.h (CPP_SPEC): Add subtarget_cpp_spec.
	(EXTRA_SPECS): Define.
	(SUBTARGET_EXTRA_SPECS): Likewise.
	(SUBTARGET_CPP_SPEC): Likewise.
	* config/arc/elf.h (EXTRA_SPECS): Renamed to
	SUBTARGET_EXTRA_SPECS.
	* config/arc/linux.h (SUBTARGET_CPP_SPEC): Define.

Co-Authored-By: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

From-SVN: r246524

vec_select expects in selection a list of subparts. The old ARC SIMD
extension instructions were not up-to-date.

gcc/
2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/simdext.md (vst64_insn): Update pattern.
	(vld32wh_insn): Likewise.
	(vld32wl_insn): Likewise.
	(vld64_insn): Likewise.
	(vld32_insn): Likewise.

From-SVN: r246523

	PR sanitizer/80067
	* fold-const.c (fold_comparison): Use protected_set_expr_location
	instead of SET_EXPR_LOCATION.

	* c-c++-common/ubsan/shift-10.c: New test.

From-SVN: r246521

	PR libstdc++/80229
	* include/bits/shared_ptr_base.h
	(__shared_ptr::_M_enable_shared_from_this_with): Change parameters to
	non-const and then use remove_cv to get unqualified type.
	* testsuite/20_util/enable_shared_from_this/members/const.cc: Don't
	cast away constness on object created const.
	* testsuite/20_util/shared_ptr/cons/80229.cc: New test.

From-SVN: r246520

/home/markus/gcc/gcc/tree.c: In function ‘void inchash::add_expr(const_tree, inchash::hash&, unsigned int)’:
/home/markus/gcc/gcc/tree.c:8013:11: warning: name lookup of ‘i’ changed
      for (i = TREE_OPERAND_LENGTH (t) - 1; i >= 0; --i)
           ^
/home/markus/gcc/gcc/tree.c:7773:7: warning:   matches this ‘i’ under ISO standard rules
   int i;
       ^
/home/markus/gcc/gcc/tree.c:7869:16: warning:   matches this ‘i’ under old rules
       for (int i = 0; i < TREE_VEC_LENGTH (t); ++i)
                ^

From-SVN: r246519

From-SVN: r246518

        PR tree-optimization/80162
	* tree-ssa-dom.c (derive_equivalences_from_bit_ior): Fix typo in
	function name.  Limit recursion depth.
	(record_temporary_equivalences): Corresponding changes.

	PR tree-optimization/80162
	* gcc.c-torture/compile/pr80216.c: New test.

From-SVN: r246517

From-SVN: r246516

	* doc/invoke.texi (-Wno-narrowing): Reorder so default behavior is
	covered first.

From-SVN: r246513

	PR middle-end/80162
c-family/
	* c-common.c (c_common_mark_addressable_vec): Don't set
	TREE_ADDRESSABLE on DECL_HARD_REGISTER.
c/
	* c-tree.h (c_mark_addressable): Add array_ref_p argument.
	* c-typeck.c (c_mark_addressable): Likewise.  Look through
	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
	to ARRAY_TYPE.
	(build_array_ref): Pass true as array_ref_p to c_mark_addressable.
cp/
	* cp-tree.h (cxx_mark_addressable): Add array_ref_p argument.
	* typeck.c (cxx_mark_addressable): Likewise.  Look through
	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
	to ARRAY_TYPE.
	(cp_build_array_ref): Pass true as array_ref_p to cxx_mark_addressable.
testsuite/
	* c-c++-common/pr80162-1.c: New test.
	* c-c++-common/pr80162-2.c: New test.
	* c-c++-common/pr80162-3.c: New test.

From-SVN: r246512

	PR target/80102
	* reg-notes.def (REG_CFA_NOTE): Define.  Use it for CFA related
	notes.
	* cfgcleanup.c (reg_note_cfa_p): New array.
	(insns_have_identical_cfa_notes): New function.
	(old_insns_match_p): Don't cross-jump in between /f
	and non-/f instructions.  If both i1 and i2 are frame related,
	verify all CFA notes, their order and content.

	* g++.dg/opt/pr80102.C: New test.

From-SVN: r246511

From-SVN: r246510

[gcc]
2017-03-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/78543
	* config/rs6000/rs6000.md (bswaphi2_extenddi): Combine bswap
	HImode and SImode with zero extend to DImode to one insn.
	(bswap<mode>2_extenddi): Likewise.
	(bswapsi2_extenddi): Likewise.
	(bswaphi2_extendsi): Likewise.
	(bswaphi2): Combine bswap HImode and SImode into one insn.
	Separate memory insns from swapping register.
	(bswapsi2): Likewise.
	(bswap<mode>2): Likewise.
	(bswaphi2_internal): Delete, no longer used.
	(bswapsi2_internal): Likewise.
	(bswap<mode>2_load): Split bswap HImode/SImode into separate load,
	store, and gpr<-gpr swap insns.
	(bswap<mode>2_store): Likewise.
	(bswaphi2_reg): Register only splitter, combine with the splitter.
	(bswaphi2 splitter): Likewise.
	(bswapsi2_reg): Likewise.
	(bswapsi2 splitter): Likewise.
	(bswapdi2): If we have the LDBRX and STDBRX instructions, split
	the insns into load, store, and register/register insns.
	(bswapdi2_ldbrx): Likewise.
	(bswapdi2_load): Likewise.
	(bswapdi2_store): Likewise.
	(bswapdi2_reg): Likewise.

[gcc/testsuite]
2017-03-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/78543
	* gcc.target/powerpc/pr78543.c: New test.

From-SVN: r246508

2017-03-27  Dominique d'Humieres  <dominiq@lps.ens.fr>

	* io/list_read.c: Insert /* Fall through. */ in the macro
	CASE_SEPARATORS in order to silence warnings.

From-SVN: r246507

	* system.h (HAVE_DESIGNATED_INITIALIZERS): Fix non C++ case.
	(HAVE_DESIGNATED_UNION_INITIALIZERS): Likewise.

From-SVN: r246506

gcc/testsuite/ChangeLog:

2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/80103
	* gcc.target/powerpc/pr80103-1.c: New test.

gcc/ChangeLog:

2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/80103
	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Edit and
	add comments.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
	special handling for target option conflicts between dform
	options (-mpower9-dform, -mpower9-dform-vector,
	-mpower9-dform-scalar) and -mno-direct-move.

From-SVN: r246505

This patch almost a decade ago:

...
    2007-08-31  Douglas Gregor  <doug.gregor@gmail.com>

        * cp-demangle.c (d_dump): Handle
        DEMANGLE_COMPONENT_RVALUE_REFERENCE.
        (d_make_comp): Ditto.
...

... missed doing the same change to cplus_demangle_fill_component that
was done to d_make_comp.  I.e., teach it to only validate that we're
not passing in a "right" subtree.  GDB has recently (finally) learned
about rvalue references, and a change to make it use
cplus_demangle_fill_component more ran into an assertion because of
this.

(GDB is the only user of cplus_demangle_fill_component in both the gcc
and binutils-gdb trees.)

libiberty/ChangeLog:
2017-03-27  Pedro Alves  <palves@redhat.com>

	* cp-demint.c (cplus_demangle_fill_component): Handle
	DEMANGLE_COMPONENT_RVALUE_REFERENCE.

From-SVN: r246502

2017-03-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/80181
	* tree-ssa-ccp.c (likely_value): UNDEFINED ^ X is UNDEFINED.

	* gcc.dg/torture/pr80181.c: New testcase.

From-SVN: r246500

Durring compilation process, (subreg (mem ...) ...) can occur. Hence,
we need to check if the address of mem is a valid one. This patch is
fixing this check by directly calling the address_operand, instead of
calling move_double_src_operand, as the latter is always checking
against the original mode, thus, returning false when the inner and
outer modes are different.

gcc/
2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/predicates.md (move_double_src_operand): Replace the
	call to move_double_src_operand with a call to address_operand.

From-SVN: r246499

libgcc/
2017-02-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/ieee-754/divdf3.S (__divdf3): Use __ARCEM__.

From-SVN: r246498

gcc/
2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/elf.h (ARGET_ARC_TP_REGNO_DEFAULT): Define.
	* config/arc/linux.h (ARGET_ARC_TP_REGNO_DEFAULT): Likewise.
	* config/arc/arc.opt (mtp-regno): Use ARGET_ARC_TP_REGNO_DEFAULT.

From-SVN: r246497

ARC can use scaled offsets when loading (i.e. ld.as rA,[base,
offset]).  Where base and offset can be a register or an immediate
operand.  The scaling only applies on the offset part of the
instruction.  The compiler can accept an address like this:

(plus:SI (mult:SI (reg:SI 2 r2 [orig:596 _2129 ] [596])
	          (const_int 4 [0x4]))
	 (const_int 60 [0x3c]))

Hence, to emit this instruction we place the (const_int 60) into base
and the register into offset to take advantage of the scaled offset
facility of the load instruction.  As a result the length of the load
instruction is 8 bytes.  However, the long_immediate_loadstore_operand
predicate used for calculating the length attribute doesn't recognize
this address and returns a wrong decision leading to a wrong length
computation for a load instruction using the above address.

gcc/
2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/predicates.md (long_immediate_loadstore_operand):
	Consider scaled addresses cases.

From-SVN: r246496

gcc/
2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_epilogue_uses): BLINK should be also
	restored when in interrupt.
	* config/arc/arc.md (simple_return): ARCv2 rtie instruction
	doesn't have delay slot.

2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/gcc.target/arc/interrupt-4.c: New file.

From-SVN: r246495

2017-03-27  Richard Biener  <rguenther@suse.de>

	PR ipa/79776
	* tree-ssa-structalias.c (associate_varinfo_to_alias): Skip
	inlined thunk clones.

	* g++.dg/ipa/pr79776.C: New testcase.

From-SVN: r246494

	PR sanitizer/80168
	* asan.c (instrument_derefs): Copy over last operand from
	original COMPONENT_REF to the new COMPONENT_REF with
	DECL_BIT_FIELD_REPRESENTATIVE.
	* ubsan.c (instrument_object_size): Likewise.

	* gcc.dg/asan/pr80168.c: New test.

From-SVN: r246492

2017-03-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/80170
	* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
	sure DR/SCEV didnt fold in constants we do not see when looking
	at the reference base alignment.

	* gcc.dg/pr80170.c: New testcase.

From-SVN: r246491

2017-03-27  Richard Biener  <rguenther@suse.de>

	PR middle-end/80171
	* gimple-fold.c (fold_ctor_reference): Properly guard against
	NULL return value from canonicalize_constructor_val.

	* g++.dg/torture/pr80171.C: New testcase.

From-SVN: r246490

From-SVN: r246489

	* gcc.dg/torture/pr79732.c: Require alias support.
	* gcc.dg/tree-ssa/pr56727.c: Move dg-require-alias after dg-do compile.

From-SVN: r246485

	* gfortran.dg/coarray_failed_images_1.f08: Add "-latomic" option if
	libatomic_available.
	* gfortran.dg/coarray_image_status_1.f08: Likewise.
	* gfortran.dg/coarray_stopped_images_1.f08: Likewise.

From-SVN: r246484

	PR libstdc++/80183
	* include/bits/stl_tree.h:
	(_Rb_tree_header::_M_move_data(_Rb_tree_header&)): Also save _M_color.

From-SVN: r246483

From-SVN: r246482

2017-03-25  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/78881
	* io/io.h (st_parameter_dt): Rename unused component last_char to
	child_saved_iostat. Move comment to gfc_unit.
	* io/list_read.c (list_formatted_read_scalar): After call to
	child READ procedure, save the returned iostat value for later
	check. (finish_list_read): Only finish READ if child_saved_iostat
	was OK.
	* io/transfer.c (read_sf_internal): If there is a saved character
	in last character, seek back one. Add a new check for EOR
	condition. (read_sf): If there is a saved character
	in last character, seek back one. (formatted_transfer_scalar_read):
	Initialize last character before invoking child procedure.
	(data_transfer_init): If child dtio, set advance
	status to nonadvancing. Move update of size and check for EOR
	condition to before child dtio return.

	* gfortran.dg/dtio_26.f90: New test.

From-SVN: r246478

re PR fortran/80156 (Generic DTIO interface reported missing if public statement preceeds the interface block)

2017-03-25  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/80156
	PR fortran/79382
	* decl.c (access_attr_decl): Remove the error for an absent
	generic DTIO interface and ensure that symbol has the flavor
	FL_PROCEDURE.

2017-03-25  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/80156
	PR fortran/79382
	* gfortran.dg/dtio_23.f90 : Remove the dg-error and add the
	testcase for PR80156. Add a main programme that tests that
	the typebound generic is accessible.

From-SVN: r246476

	PR target/80180
	* config/i386/i386.c (ix86_expand_builtin)
	<IX86_BUILTIN_RDSEED{16,32,64}_STEP>: Do not expand arg0 between
	flags reg setting and flags reg using instructions.
	<IX86_BUILTIN_RDRAND{16,32,64}_STEP>: Ditto.  Use non-flags reg
	clobbering instructions to zero extend op2.

From-SVN: r246475

	* doc/install.texi (Configuration) <--with-aix-soname>:
	Update link to AIX ld.

From-SVN: r246474

	PR rtl-optimization/80160
	PR rtl-optimization/80159
	* lra-assigns.c (must_not_spill_p): Tighten new test to also take
	reg_alternate_class into account.

	* gcc.target/i386/pr80160.c: New test.

From-SVN: r246473

From-SVN: r246472

	PR sanitizer/79904
	* gcc.dg/ubsan/pr79904-2.c: Add -Wno-psabi to dg-options.

From-SVN: r246468

2017-03-24  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/80148
	* lra-assigns.c (assign_by_spills): Add spilled non-reload pseudos
	to consider in curr_insn_transform.

From-SVN: r246467